framework-arduinoteensy-cxx20/libraries/RA8875/Examples/_Energia_IDE/rotationTest/rotationTest.ino

/*
this sketch demostrate the ability to rotate screen .
since his introduction, setRotation created some problems in library
because RA8875 does most of his stuff internally so from library version 0.69b21
code has many changes to fix the rotation issues.

 */

#include <SPI.h>
#include <RA8875.h>

#define RA8875_RESET 9//any pin or nothing!

#if defined(NEEDS_SET_MODULE)//Energia, this case is for stellaris/tiva

RA8875 tft = RA8875(3);//select SPI module 3
/*
for module 3 (stellaris)
 SCLK:  PD_0
 MOSI:  PD_3
 MISO:  PD_2
 SS:    PD_1
 */
#endif

void setup() 
{
  Serial.begin(38400);
  //long unsigned debug_start = millis ();
  //while (!Serial && ((millis () - debug_start) <= 5000)) ;
  //Serial.println("RA8875 start");
  tft.begin(RA8875_800x480);
}


uint8_t rot = 0;

void loop() 
{
  tft.fillWindow();
  tft.setRotation(rot);
  tft.setCursor(0,0);
  tft.print("[rotation ");
  tft.print(rot);
  tft.print("]");
  tft.setCursor(100,0);
  tft.print("txt shifted to X100");
  tft.setCursor(0,20);
  tft.print("txt shifted to Y20");
  tft.drawCircle(tft.width()/2,tft.height()/2,50,RA8875_GREEN);
  tft.drawRect((tft.width()/2)-50,(tft.height()/2)-25,100,50,RA8875_YELLOW);
  tft.drawEllipse(tft.width()/2,tft.height()/2,50,25,RA8875_CYAN);
  tft.drawTriangle((tft.width()/2)-50,(tft.height()/2)-25,tft.width()/2,(tft.height()/2)+25,(tft.width()/2)+50,(tft.height()/2)-25,RA8875_RED);
  tft.drawPixel(tft.width()/2,tft.height()/2,RA8875_WHITE);
  tft.drawFastVLine(tft.width()/2,(tft.height()/2)-60,60,RA8875_RED);
  tft.drawFastHLine((tft.width()/2)-60,tft.height()/2,60,RA8875_RED);
  delay(3000);
  if (rot > 3) rot = 0;
  rot++;
}